Light electric trolley for crane

Abstract

The invention relates to a light electric trolley for a crane. The light electric trolley comprises a trolley frame. A roller is arranged on the upper surface of the trolley frame. A left end cover and a right end cover are arranged at the two ends of the roller respectively. A supporting shaft A and a supporting shaft B are arranged in the center of the left end cover and the center of the right end cover respectively and arranged on a left support and a right support respectively. The supporting shaft A is provided with a synchronous tooth-profile large belt wheel. The synchronous tooth-profile large belt wheel is connected with a synchronous tooth-profile small belt wheel through a tooth-profile belt, and the synchronous tooth-profile small belt wheel is arranged on an output shaft of a motor. A harmonic generator is arranged on the part, in the roller, of the supporting shaft A. A flexible wheel is arranged outside the harmonic generator. The outer circumference of the flexible wheel is connected with a rigid wheel in an engaged manner. The rigid wheel is fixedly connected to a supporting base through a bolt. A steel wire rope is wound on the outer wall of the roller and connected with a lifting hook assembly through a fixed pulley assembly, and a walking mechanism is arranged on the lower surface of the trolley frame. The light electric trolley is compact in structure, small in dead load, large in bearing capability and high in transmission efficiency.

Description

technical field [0001] The invention belongs to the technical field of cranes, in particular to an electric trolley, in particular to a portable electric trolley for cranes. Background technique [0002] In cranes, electric trolleys are mainly used to lift and move goods. Among them, the lifting mechanism is the most important and most basic mechanism in electric trolleys. Its structure type directly affects the size and weight of the crane trolley. Traditional In the electric trolleys used in beam-type and bridge-type cranes, the motor is parallel to the axis of the drum or the motor, the reducer and the drum are arranged in a straight line. Among them, the first arrangement is simple in design and easy to use, but it requires the trolley to It has sufficient strength and rigidity to increase the self-weight of the small frame, and the overall structure of each part on the small frame is loose, and the installation and adjustment are also more troublesome; the second arrang...

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Problems solved by technology

[0002] In the crane, the electric trolley is mainly used to realize the lifting and moving of the goods. Among them, the lifting mechanism is the most important and basic mechanism in the electric trolley. Its structure directly affects the size and weight of the crane trolley. The traditional In the electric trolleys used in beam and bridge cranes, the motor and the roller axis are parallel or the motor, reducer and roller are arranged in a straight line. Among them, the first arrangement is simple in design and easy to use, but it requires that the trolley frame must be It has sufficient strength and rigidity, so that the self-weight of the trolley frame increases, and the overall structure of each component on the trolley frame is loose, and installation and adjustment are also troublesome; the second arrangement is to arrange the motor and the roller respectively on the same The two ends of the axis reducer, the transmission ratio of the reducer in this arrangement cannot be made very large, otherwise the diameter of the drum needs to be increased. The volume of the whole machine will be large; therefore, it is very necessary to provide a portable electric trolley for cranes with small dead weight, large carrying capacity and high transmission efficiency

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